Meteor camera - permission denied on Chrome - google-chrome

Question

I have created a small app on MeteorJS, which is using the camera at some point to take pictures.
To do so, I just use the mdg:camera package.
It all works fine on my localhost:3000
Now the problem came when I deployed the app to meteor (xxx.meteor.com)
When testing it, when I try to launch the camera, Chrome complains with
Camera permission denied
Without asking me first if I want to allow or block the camera.
They suggest going to :
Go to Settings > "Show advanced settings..." > "Content settings..." > Media heading > "Manage exceptions...", then find this website in the list and allow video capture.
After going there, I can see my localhost:3000 being allowed, but that's it. I can't find any options to add manually any new exceptions.
Would any of you had this issue ? Is it a Meteor issue, where the settings are not set properly, or a Chrome settings issue ?
PS : if that helps, here is how I use the camera (I take the picture and save it in session):
var options = {
width: 350,
height: 350,
quality: 75,
};
MeteorCamera.getPicture(options, function(err, data) {
if (err) {
console.log('error', err);
}
if (data) {
img = Session.get('img');
if( typeof img == 'undefined') {
img = [];
}
img.push( {hash: (Date.now() / 1000 | 0), data: data});
Session.set('img', img);
}
});
Update
I have tried on Opera, camera works fine. It first complains that the permission is not right, but it gives me at the same time a popup to allow or block the camera. After clicking on Allow, the camera works fine.
On Chrome even with removing the cookies (maybe the preference would be saved in one ??), still no luck.